/Engine/Source/Editor/MaterialEditor/Public/MaterialEditorSettings.h
struct FPreviewBackgroundSettings
FColor
BackgroundColor
The color used as the background of the preview.
EBackgroundType
BackgroundType
The type of background to show (configured via the material editor)
FColor
BorderColor
Color to use for the border, if enabled.
bool
bShowBorder
If true, displays a border around the texture (configured via the material editor)
FCheckerboardSe...
Checkerboard